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grlib/b1553rt: Fix bit shift direction

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The RT_TSW_OK field is set to 1 if there was no error. The Message Error
(ME) field indicates an error and must be set to 0 if there was no error
so the result of tsw&RT_TSW_OK must be negated. It is then left-shifted
to the Messsage Error (ME) bit field of the message information word.

Fix issue CID 1399772
This commit is contained in:
Matteo Concas
2024-10-25 09:59:51 +02:00
parent 80ef0dee02
commit 8820b8e63f
1 changed files with 1 additions and 1 deletions
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bsps/shared/grlib/1553/b1553rt.c
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@@ -745,7 +745,7 @@ static void b1553rt_interrupt(void *arg)
tsw = READ_DMA(&rt->mem[tx*0x3E0+suba]);
/* Build Message Information Word (B1553BRM-style) */
miw = (wc<<11) | (tsw&RT_TSW_BUS)>>4 | !(tsw&RT_TSW_OK)>>7 | (tsw&RT_TSW_ILL)>>5 |
miw = (wc<<11) | (tsw&RT_TSW_BUS)>>4 | !(tsw&RT_TSW_OK)<<7 | (tsw&RT_TSW_ILL)>>5 |
(tsw&RT_TSW_PAR)>>5 | (tsw&RT_TSW_MAN)>>7;
descriptor = (tx << 5) | suba;